The relation between the rigorous and Helmert's definitions of orthometric heights
Santos, M.C.
;
Vanicek, P.
;
Featherstone, W.E.
;
Kingdon, R.
;
Ellmann, Artu
;
Martin, B.-A.
;
Kuhn, M.
;
Tenzer, Robert
Journal of geodesy
2006
/
12, p. 691-704